A quarter of an hour before sunset a beautiful rainbow pileus developed on top of a cumulonimbus cloud over Chikanga Township, Mutare. The four pictures, taken over a period of just three minutes using a Panasonic Lumix DMC-TZ60 camera with x30 zoom magnification, show it appearing and then changing shape and color. One minute later it had disappeared behind the summit of the growing cumulonimbus cloud. This is a classic example of rainbow pileus formation.